UINavigationBar rounded corners

ShadowRadius.mm

    CALayer *capa = [self.navigationController navigationBar].layer;
    [capa setShadowColor: [[UIColor blackColor] CGColor]];
    [capa setShadowOpacity:0.85f];
    [capa setShadowOffset: CGSizeMake(0.0f, 1.5f)];
    [capa setShadowRadius:2.0f];
    [capa setShouldRasterize:YES];
    
    
    //Round
    CGRect bounds = capa.bounds;
    bounds.size.height += 10.0f;  
    UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:bounds
                                                   byRoundingCorners:(UIRectCornerTopLeft | UIRectCornerTopRight)
                                                         cornerRadii:CGSizeMake(10.0, 10.0)];
    
    CAShapeLayer *maskLayer = [CAShapeLayer layer];
    maskLayer.frame = bounds;
    maskLayer.path = maskPath.CGPath;
    
    [capa addSublayer:maskLayer];
    capa.mask = maskLayer;